package com.sky.service.impl;


import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    /**
     * 实现加入购物车操作
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        //判断是否存在
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long id = BaseContext.getCurrentId();
        shoppingCart.setUserId(id);
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(shoppingCart);
        if(shoppingCarts!=null&&shoppingCarts.size()>0){
            //+1
            ShoppingCart cart = shoppingCarts.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNuberById(cart);
        }else {
            //不存在，插入新数据
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId!=null){
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setImage(dish.getImage());


            }else {
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setImage(setmeal.getImage());

            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }


    }

    @Override
    public List<ShoppingCart> showShoppingCart(Long id) {

        ShoppingCart shoppingCart = ShoppingCart.builder().userId(id)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        return list;
    }

    @Override
    public void cleanShoppingCart() {
        Long id = BaseContext.getCurrentId();

        shoppingCartMapper.deleteByUserId(id);

    }

    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {

        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);


        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        ShoppingCart cart = list.get(0);
        Integer number = cart.getNumber();

        if (number==1){
            shoppingCartMapper.deleteById(cart);
        }else {
            cart.setNumber(number-1);
            shoppingCartMapper.updateNuberById(cart);
        }


    }
}
